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Developers/Nano Banana API

Nano Banana API

Generate images from text or guide edits with ordered references. Choose classic Nano Banana or Nano Banana 2.1, which supports up to 14 references and 1K at 6 credits, 2K at 8 credits or 4K at 10 credits per task.

Get API keyView API docs
Abstract illustration for Nano Banana API
PlaygroundAPIPricingGuideFAQs

Nano Banana API Playground

Use your existing API key and subscription. Submitting a generation uses credits; uploading and preparing a request does not start a generation.

API access is available to subscribers only. Your subscription credits are shared across the website and the API.

View plans

Parameter

4 parameters

Text prompt describing the image to generate (max 20000 chars). For an unspecified character or figurine, use an original non-branded character with no logos and no resemblance to existing copyrighted superheroes; preserve any character the user explicitly names.

Optional input image URL. When provided, the task runs in image edit mode.(Optional)

Ordered input image URLs for image editing mode. The prompt can reference them by their one-based order.(Optional)

minItems 1maxItems 5

Output aspect ratio.(Optional)

Default: 3:4

Request code

#!/usr/bin/env bash
set -euo pipefail
# Set this once per intended task; preserve it and the body for transport retries.
: "${VIDMAGE_IDEMPOTENCY_KEY:?Set a unique key for this task}"

SUBMIT_RESPONSE="$(curl --fail-with-body --silent --show-error -X POST "https://vidmage.ai/api/v1/nano-banana-ai-image-generator/submit" \
  -H "Authorization: Bearer ${VIDMAGE_API_KEY}" \
  -H "Idempotency-Key: ${VIDMAGE_IDEMPOTENCY_KEY}" \
  -H "Content-Type: application/json" \
  --data-raw '{
  "prompt": "A playful corgi working as a barista in a bright modern cafe, detailed commercial illustration",
  "aspectRatio": "3:4"
}')"
TASK_ID="$(printf '%s' "$SUBMIT_RESPONSE" | jq -er '.["taskId"]')"

while true; do
  QUERY_RESPONSE="$(curl --fail-with-body --silent --show-error -X POST "https://vidmage.ai/api/v1/nano-banana-ai-image-generator/query" \
    -H "Authorization: Bearer ${VIDMAGE_API_KEY}" \
    -H "Content-Type: application/json" \
    --data-raw "{\"taskId\":\"${TASK_ID}\"}")"
  STATUS="$(printf '%s' "$QUERY_RESPONSE" | jq -r '(.status // .data.status // "") | ascii_downcase')"
  case "$STATUS" in
    success|succeeded|completed)
      RESULT="$(printf '%s' "$QUERY_RESPONSE" | jq -r '(.result // .["imageUrl"] // .data["imageUrl"] // empty)')"
      if [ -z "$RESULT" ]; then
        printf '%s' "Result missing; preserve task $TASK_ID and query the same task again. Do not resubmit." >&2
        exit 2
      fi
      printf '%s\n' "$RESULT"
      break
      ;;
    needs_input)
      printf '%s' "Face selection required; preserve task $TASK_ID" >&2
      exit 2
      ;;
    failed|error)
      printf '%s' "$QUERY_RESPONSE" | jq -r '(.message // .error // .data.error // "Task failed")' >&2
      exit 1
      ;;
  esac
  sleep 5
done

Response data

Submit the task to see the API response here.
PlaygroundCapabilities

API documentation

Submit a request, track the task, and retrieve your result.

EndpointNano Banana AI Image Generator ↓
Required inputs
prompt
Output
Image·imageUrl
EndpointNano Banana 2.1 AI Image Generator ↓
Required inputs
prompt
Output
Image·imageUrl
Request setup & limitsHeaders, input options and media limits

Request headers

Authorization
Bearer YOUR_API_KEY

Keep your API key on your server.

Content-Type
application/json
Idempotency-Key
YOUR_UNIQUE_KEY

Use a new key per task. Reuse it only when retrying the same submission.

Input options & limits

Request controls follow each task's parameter rules; they do not guarantee output properties.

Nano Banana AI Image Generator

Modes: text-to-image, image-edit

Additional inputs; requirements vary by mode

prompt imageUrl imageUrls

Media limits by mode
  • Image EditImage: jpg, png; up to 5 files
Request controls
  • aspectRatio: 11 accepted values; see parameter rules

Nano Banana 2.1 AI Image Generator

Modes: text-to-image, image-edit

Additional inputs; requirements vary by mode

prompt imageUrl imageUrls

Media limits by mode
  • Image EditImage: jpg, jpeg, png, webp; up to 10 MB per file; up to 14 files
Request controls
  • aspectRatio: 14 accepted values; see parameter rules
  • resolution: "1k", "2k", "4k"

Input retention and output-link lifetime depend on the API contract. Confirm API-specific retention terms before making promises to your users. Upload guide ↗

Nano Banana AI Image Generator

POST /api/v1/nano-banana-ai-image-generator/submit

Full API documentation ↗

prompt is required.

Required inputs

promptstring
Text prompt describing the image to generate (max 20000 chars). For an unspecified character or figurine, use an original non-branded character with no logos and no resemblance to existing copyrighted superheroes; preserve any character the user explicitly names.

Edit the sample inputs for your own task before submitting.

Nano Banana AI Image Generator request
# Set VIDMAGE_IDEMPOTENCY_KEY to a unique value for this task; preserve it for transport retries.
curl -X POST "https://vidmage.ai/api/v1/nano-banana-ai-image-generator/submit" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Idempotency-Key: ${VIDMAGE_IDEMPOTENCY_KEY}" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"A playful corgi working as a barista in a bright modern cafe, detailed commercial illustration","aspectRatio":"3:4"}'
# -> { "success": true, "taskId": "...", "creditsConsumed": ... }
Parameters and input rules4 fields
FieldTypeRequiredDefaultMeaning and limits
promptstringYesNot specifiedText prompt describing the image to generate (max 20000 chars). For an unspecified character or figurine, use an original non-branded character with no logos and no resemblance to existing copyrighted superheroes; preserve any character the user explicitly names. Minimum length: 1 · Maximum length: 20000
imageUrlstringNoNot specifiedOptional input image URL. When provided, the task runs in image edit mode. No additional field constraint listed.
imageUrlsstring[]NoNot specifiedOrdered input image URLs for image editing mode. The prompt can reference them by their one-based order. Minimum items: 1 · Maximum items: 5
aspectRatiostringNo"3:4"Output aspect ratio. Values: "auto", "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "21:9" · Default: "3:4"
Mode-specific fields & media limits
Text To Image rules
ControlMode-specific rule
promptRequired; minimum 1 characters; maximum 20000 characters
aspectRatioValues: "auto", "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "21:9"; mode default: "3:4"
Image Edit rules
ControlMode-specific rule
promptRequired; minimum 1 characters; maximum 20000 characters
aspectRatioValues: "auto", "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "21:9"; mode default: "auto"
imageUrlsImage input; up to 5 items

Retrieve the result

Save taskId from the accepted submission and send it to this endpoint:

POST /api/v1/nano-banana-ai-image-generator/query

Use the same Bearer API key. On completion, read the imageUrl result field.

Task states and recovery ↗
Nano Banana AI Image Generator query
curl -X POST "https://vidmage.ai/api/v1/nano-banana-ai-image-generator/query" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "taskId": "TASK_ID_FROM_SUBMIT" }'
# -> { "success": true, "data": { "status": "...", "imageUrl": "https://..." } }

Nano Banana 2.1 AI Image Generator

POST /api/v1/nano-banana-2-1-ai-image-generator/submit

Full API documentation ↗

prompt is required.

Required inputs

promptstring
Text prompt describing the image to generate (max 20000 chars). For an unspecified character or figurine, use an original non-branded character with no logos and no resemblance to existing copyrighted superheroes; preserve any character the user explicitly names.

Edit the sample inputs for your own task before submitting.

Nano Banana 2.1 AI Image Generator request
# Set VIDMAGE_IDEMPOTENCY_KEY to a unique value for this task; preserve it for transport retries.
curl -X POST "https://vidmage.ai/api/v1/nano-banana-2-1-ai-image-generator/submit" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Idempotency-Key: ${VIDMAGE_IDEMPOTENCY_KEY}" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"A sage-green serum bottle labeled MORI on pale travertine, soft morning light, premium product photography","aspectRatio":"1:1","resolution":"1k"}'
# -> { "success": true, "taskId": "...", "creditsConsumed": ... }
Parameters and input rules5 fields
FieldTypeRequiredDefaultMeaning and limits
promptstringYesNot specifiedText prompt describing the image to generate (max 20000 chars). For an unspecified character or figurine, use an original non-branded character with no logos and no resemblance to existing copyrighted superheroes; preserve any character the user explicitly names. Minimum length: 1 · Maximum length: 20000
imageUrlstringNoNot specifiedOptional input image URL. When provided, the task runs in image edit mode. No additional field constraint listed.
imageUrlsstring[]NoNot specifiedOrdered input image URLs for image editing mode. The prompt can reference them by their one-based order. Up to 10 MB per file. Minimum items: 1 · Maximum items: 14
aspectRatiostringNo"1:1"Output aspect ratio. Values: "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "21:9", "1:4", "4:1", "1:8", "8:1" · Default: "1:1"
resolutionstringNo"1k"Output resolution tier. Values: "1k", "2k", "4k" · Default: "1k"
Mode-specific fields & media limits
Text To Image rules
ControlMode-specific rule
promptRequired; minimum 1 characters; maximum 20000 characters
aspectRatioValues: "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "21:9", "1:4", "4:1", "1:8", "8:1"; mode default: "1:1"
resolutionValues: "1k", "2k", "4k"; mode default: "1k"
Image Edit rules
ControlMode-specific rule
promptRequired; minimum 1 characters; maximum 20000 characters
aspectRatioValues: "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "21:9", "1:4", "4:1", "1:8", "8:1"; mode default: "1:1"
resolutionValues: "1k", "2k", "4k"; mode default: "1k"
imageUrlsImage input; up to 14 items

Retrieve the result

Save taskId from the accepted submission and send it to this endpoint:

POST /api/v1/nano-banana-2-1-ai-image-generator/query

Use the same Bearer API key. On completion, read the imageUrl result field.

Task states and recovery ↗
Nano Banana 2.1 AI Image Generator query
curl -X POST "https://vidmage.ai/api/v1/nano-banana-2-1-ai-image-generator/query" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "taskId": "TASK_ID_FROM_SUBMIT" }'
# -> { "success": true, "data": { "status": "...", "imageUrl": "https://..." } }

Pricing

See what one image, video, or generation costs in credits. Your API and website activity share the same credit balance.

API credit rates and calculated example request costs
API / workflowExample requestPrice (credits)
Nano Banana AI Image Generatorimage API1 image request: 5 credits
How this is calculated
  • Base rate: 5 credits / generation

Base charge is per generation at the selected resolution.

Estimate your own request ↗
5 credits / generationSee calculation details
Nano Banana 2.1 AI Image Generatorimage API1 image request: 6 creditsresolution: 1k
How this is calculated
  • 1k: 6 credits / generation
  • 2k: 8 credits / generation
  • 4k: 10 credits / generation

Base charge is per generation at the selected resolution.

Estimate your own request ↗
6–10 credits / generationBase rate varies by settings or workflow
Billed in credits. Shared with the website.Active subscription required. Unit rates and examples follow current API credit rules.Billing details⌄

Examples show the charge for the inputs listed above. Resolution, duration, audio, output count and reference media can change the total. Minimum charges and rounding follow the selected API.

Use the Playground to estimate your request before submitting it. Estimates do not start a generation. Subscription and credit-pack prices are listed on the plans page.

Your task’s recorded usage is the source of truth for the final charge.

View plans ↗Billing guide ↗

About Nano Banana API

VidMage offers separate Nano Banana and Nano Banana 2.1 capabilities. Classic Nano Banana accepts up to five reference images and costs 5 credits per task. Nano Banana 2.1 accepts up to 14 references, 10 MB each, and offers 14 fixed aspect ratios plus 1K, 2K and 4K output at 6, 8 and 10 credits per task respectively, with no reference surcharge. Explore the browser workflows in Nano Banana AI Image Generator and Nano Banana 2.1 AI Image Generator.

Nano Banana API capabilities

Choose an image workflow
Select classic Nano Banana or Nano Banana 2.1 in the Playground. Each capability supports text generation and reference-led editing.
Use ordered reference images
Classic accepts up to five images. Nano Banana 2.1 accepts up to 14 images at 10 MB each; explain each reference by its one-based position.
Select output controls
Nano Banana 2.1 supports 14 fixed aspect ratios and 1K, 2K or 4K. Classic keeps its existing automatic or fixed framing controls.

What you can build

Product lifestyle images

Move beyond a plain product shot by pairing it with a room reference. Describe where the item belongs and how the setting should look. A seller can inspect the resulting composition as a possible addition to the listing.

Story character scene boards

A traveler arriving at an inn needs both a character design and a sense of place. Supply those as separate image references and explain the scene in the prompt, giving the storyboard artist a composition to develop further.

Event campaign illustrations

Festival posters, ticket pages, and social announcements need visuals that fit different spaces. Generate a scene from the event brief with the chosen framing and room for copy; your design editor supplies the exact dates, venue, and ticket details.

How to use Nano Banana API

  1. Get an API key

    Create a key in the Developer Console and store it on your server. Use it in the Authorization: Bearer header.

  2. Prepare and submit your inputs

    Set up your inputs in the Playground, then copy the matching API request. Send it from your server with a unique Idempotency-Key.

  3. Track the task

    Save the returned taskId and query the same operation until it completes. Keep that identifier if your app stops waiting.

  4. Retrieve the result

    Read imageUrl from the completed task. Preview the result in your app and save a copy to your own storage for later use.

Input tips
Select the intended capability
Use nano-banana-2-1-ai-image-generator for Nano Banana 2.1. The existing nano-banana-ai-image-generator remains a separate capability.
Use the matching reference limit
Classic accepts five sources. Nano Banana 2.1 accepts 14 at 10 MB each. Do not send both imageUrl and imageUrls.
Keep pricing predictable
Nano Banana 2.1 costs 6 credits at 1K, 8 credits at 2K and 10 credits at 4K; reference images do not add a surcharge.

Input requirementsUpload local files

Task fields and results

Keep the task identifier with its original request and Idempotency-Key. Query the same capability until it completes, then read the documented result field.

Task identifier
taskId
Query route
POST /api/v1/nano-banana-ai-image-generator/query
Completed result
imageUrl
Task states and response structure ↗
Errors, retries and limits

Retry transport failures with the same idempotency key only when the original submission may not have reached the server. For a confirmed task, keep querying the original task instead of submitting a duplicate.

Read error recovery guidance ↗

FAQs

How do I choose Nano Banana 2.1?

Select the nano-banana-2-1-ai-image-generator capability. It supports up to 14 image references and 1K at 6 credits, 2K at 8 credits or 4K at 10 credits per generation. Classic Nano Banana remains available under its existing capability. Neither operation accepts an arbitrary Gemini model ID.

Nano Banana 2.1 model and API ↗Try Nano Banana 2.1 ↗
Are failed or timed-out requests charged?

A client timeout is not a confirmed task failure. Confirmed failures are automatically refunded only when the refund outcome is certain. Unknown charges or refunds remain pending reconciliation.

Failure and refund handling ↗
How long should my app wait for a result?

The checked contract does not establish a fixed completion time. Choose a local wait budget for your app; it is not an API completion deadline.

Polling and wait budgets ↗
What are the rate and concurrency limits?

Request-rate limits control how often you can call the API; concurrency limits control simultaneous work. The documentation ties both to the stable API key but does not publish numeric limits for this operation. Confirm account limits before planning parallel jobs.

Rate-limit recovery ↗
Can I receive results through a webhook?

The checked request contract documents status queries and does not list a webhook or callback field for these routes. Check the current authenticated OpenAPI contract before making a callback part of your integration.

Query task results ↗Check the current contract ↗

Explore more APIs on VidMage

  • Grok Image API↗
  • GPT Image API↗
  • Seedream API↗
  • Qwen Image API↗
  • Midjourney Image API↗
  • Z-Image API↗
  • Wan Image API↗
  • AI GIF Face Swap API for Animated Images↗